Lucky Line Extra Large Magnetic Key Hider, Black, 1 Pack (91201) for Large Keys FITS LARGE KEYS; extra large key hider dimensions are 3-7/8 inch (W) x 2-1/8 inch (L) x 5/8 inch (H); Inside depth is 9/16 inch TWO HEAVY DUTY magnets hold on to any steel surface; strong enough to be placed underneath a car and survive rough terrain DURABLE and rugged black plastic case with easy-slide lid keeps key secure and dry AVOID LOCKOUTS; Hide a key for emergencies or lockouts; safely hide a key for friends, family, neighbors, and children SECURE cover slides open and closed, keeping keys safe and locked inside